Use native string methods.

Saves about 100ms over the whole namespace.
Add test for sole Bcc: without To:.
Whitespace.
Add custom message-id support.
Ignore /target.
Whitespace.
Add user-agent.
Add 1.9.0 changes.
Release 1.9.0.
Bump version in readme.
Reword.
Add license header.
save changes in make-jmessage
the real culprit!
Add David.
Release 1.9.1.
Added content id
Add Kevin.
v1.9.2.
Break line.